What is this rock/metal song?

[lightwings21]

it plays for the last 9 seconds of this youtube clip. I remember this from way back, but cant get the name. It has been bugging me for the last 2 hours. I could swear its Megadeth or Avenged Sevenfold or something i just cant put my finger on it.
http://www.youtube.com/watch?v=NNW72tNmESM&feature=related

the clip
THE LINK IS IN THE DETAILS!!!!